X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsTargetMachine.cpp;h=984c58eb6c1e3a138818bac9ed964ef32af43625;hb=61e341e0bfcc83ec865fe763759e66ab3c2feba5;hp=e82dcee6362046814c035cb3ad2e959e49165c89;hpb=4cb1e13769856716261a4d315f8202bd918502c3;p=oota-llvm.git diff --git a/lib/Target/Mips/MipsTargetMachine.cpp b/lib/Target/Mips/MipsTargetMachine.cpp index e82dcee6362..984c58eb6c1 100644 --- a/lib/Target/Mips/MipsTargetMachine.cpp +++ b/lib/Target/Mips/MipsTargetMachine.cpp @@ -11,76 +11,248 @@ // //===----------------------------------------------------------------------===// -#include "Mips.h" -#include "MipsTargetAsmInfo.h" #include "MipsTargetMachine.h" -#include "llvm/Module.h" +#include "Mips.h" +#include "Mips16FrameLowering.h" +#include "Mips16HardFloat.h" +#include "Mips16ISelDAGToDAG.h" +#include "Mips16ISelLowering.h" +#include "Mips16InstrInfo.h" +#include "MipsFrameLowering.h" +#include "MipsInstrInfo.h" +#include "MipsModuleISelDAGToDAG.h" +#include "MipsOs16.h" +#include "MipsSEFrameLowering.h" +#include "MipsSEISelDAGToDAG.h" +#include "MipsSEISelLowering.h" +#include "MipsSEInstrInfo.h" +#include "llvm/Analysis/TargetTransformInfo.h" +#include "llvm/CodeGen/Passes.h" #include "llvm/PassManager.h" -#include "llvm/Target/TargetMachineRegistry.h" +#include "llvm/Support/Debug.h" +#include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Transforms/Scalar.h" using namespace llvm; -// Register the target. -static RegisterTarget X(TheMipsTarget, "mips", "Mips"); +#define DEBUG_TYPE "mips" + +extern "C" void LLVMInitializeMipsTarget() { + // Register the target. + RegisterTargetMachine X(TheMipsTarget); + RegisterTargetMachine Y(TheMipselTarget); + RegisterTargetMachine A(TheMips64Target); + RegisterTargetMachine B(TheMips64elTarget); +} + +static std::string computeDataLayout(const MipsSubtarget &ST) { + std::string Ret = ""; -static RegisterTarget Y(TheMipselTarget, "mipsel", - "Mipsel"); + // There are both little and big endian mips. + if (ST.isLittle()) + Ret += "e"; + else + Ret += "E"; -// Force static initialization. -extern "C" void LLVMInitializeMipsTarget() { } + Ret += "-m:m"; -const TargetAsmInfo *MipsTargetMachine:: -createTargetAsmInfo() const -{ - return new MipsTargetAsmInfo(*this); + // Pointers are 32 bit on some ABIs. + if (!ST.isABI_N64()) + Ret += "-p:32:32"; + + // 8 and 16 bit integers only need no have natural alignment, but try to + // align them to 32 bits. 64 bit integers have natural alignment. + Ret += "-i8:8:32-i16:16:32-i64:64"; + + // 32 bit registers are always available and the stack is at least 64 bit + // aligned. On N64 64 bit registers are also available and the stack is + // 128 bit aligned. + if (ST.isABI_N64() || ST.isABI_N32()) + Ret += "-n32:64-S128"; + else + Ret += "-n32-S64"; + + return Ret; } -// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment -// The stack is always 8 byte aligned // On function prologue, the stack is created by decrementing // its pointer. Once decremented, all references are done with positive -// offset from the stack/frame pointer, using StackGrowsUp enables +// offset from the stack/frame pointer, using StackGrowsUp enables // an easier handling. // Using CodeModel::Large enables different CALL behavior. MipsTargetMachine:: -MipsTargetMachine(const Target &T, const Module &M, const std::string &FS, - bool isLittle=false): - LLVMTargetMachine(T), - Subtarget(*this, M, FS, isLittle), - DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") : - std::string("E-p:32:32:32-i8:8:32-i16:16:32")), - InstrInfo(*this), - FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0), - TLInfo(*this) -{ - // Abicall enables PIC by default - if (Subtarget.hasABICall()) - setRelocationModel(Reloc::PIC_); - - // TODO: create an option to enable long calls, like -mlong-calls, - // that would be our CodeModel::Large. It must not work with Abicall. - if (getCodeModel() == CodeModel::Default) - setCodeModel(CodeModel::Small); +MipsTargetMachine(const Target &T, StringRef TT, + StringRef CPU, StringRef FS, const TargetOptions &Options, + Reloc::Model RM, CodeModel::Model CM, + CodeGenOpt::Level OL, + bool isLittle) + : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL), + Subtarget(TT, CPU, FS, isLittle, RM, this), + DL(computeDataLayout(Subtarget)), + InstrInfo(MipsInstrInfo::create(*this)), + FrameLowering(MipsFrameLowering::create(*this, Subtarget)), + TLInfo(MipsTargetLowering::create(*this)), TSInfo(*this), + InstrItins(Subtarget.getInstrItineraryData()), JITInfo() { + initAsmInfo(); +} + + +void MipsTargetMachine::setHelperClassesMips16() { + InstrInfoSE.swap(InstrInfo); + FrameLoweringSE.swap(FrameLowering); + TLInfoSE.swap(TLInfo); + if (!InstrInfo16) { + InstrInfo.reset(MipsInstrInfo::create(*this)); + FrameLowering.reset(MipsFrameLowering::create(*this, Subtarget)); + TLInfo.reset(MipsTargetLowering::create(*this)); + } else { + InstrInfo16.swap(InstrInfo); + FrameLowering16.swap(FrameLowering); + TLInfo16.swap(TLInfo); + } + assert(TLInfo && "null target lowering 16"); + assert(InstrInfo && "null instr info 16"); + assert(FrameLowering && "null frame lowering 16"); } +void MipsTargetMachine::setHelperClassesMipsSE() { + InstrInfo16.swap(InstrInfo); + FrameLowering16.swap(FrameLowering); + TLInfo16.swap(TLInfo); + if (!InstrInfoSE) { + InstrInfo.reset(MipsInstrInfo::create(*this)); + FrameLowering.reset(MipsFrameLowering::create(*this, Subtarget)); + TLInfo.reset(MipsTargetLowering::create(*this)); + } else { + InstrInfoSE.swap(InstrInfo); + FrameLoweringSE.swap(FrameLowering); + TLInfoSE.swap(TLInfo); + } + assert(TLInfo && "null target lowering in SE"); + assert(InstrInfo && "null instr info SE"); + assert(FrameLowering && "null frame lowering SE"); +} +void MipsebTargetMachine::anchor() { } + +MipsebTargetMachine:: +MipsebTargetMachine(const Target &T, StringRef TT, + StringRef CPU, StringRef FS, const TargetOptions &Options, + Reloc::Model RM, CodeModel::Model CM, + CodeGenOpt::Level OL) + : MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {} + +void MipselTargetMachine::anchor() { } + MipselTargetMachine:: -MipselTargetMachine(const Target &T, const Module &M, const std::string &FS) : - MipsTargetMachine(T, M, FS, true) {} +MipselTargetMachine(const Target &T, StringRef TT, + StringRef CPU, StringRef FS, const TargetOptions &Options, + Reloc::Model RM, CodeModel::Model CM, + CodeGenOpt::Level OL) + : MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {} + +namespace { +/// Mips Code Generator Pass Configuration Options. +class MipsPassConfig : public TargetPassConfig { +public: + MipsPassConfig(MipsTargetMachine *TM, PassManagerBase &PM) + : TargetPassConfig(TM, PM) { + // The current implementation of long branch pass requires a scratch + // register ($at) to be available before branch instructions. Tail merging + // can break this requirement, so disable it when long branch pass is + // enabled. + EnableTailMerge = !getMipsSubtarget().enableLongBranchPass(); + } + + MipsTargetMachine &getMipsTargetMachine() const { + return getTM(); + } + + const MipsSubtarget &getMipsSubtarget() const { + return *getMipsTargetMachine().getSubtargetImpl(); + } -// Install an instruction selector pass using + void addIRPasses() override; + bool addInstSelector() override; + void addMachineSSAOptimization() override; + bool addPreEmitPass() override; + + bool addPreRegAlloc() override; + +}; +} // namespace + +TargetPassConfig *MipsTargetMachine::createPassConfig(PassManagerBase &PM) { + return new MipsPassConfig(this, PM); +} + +void MipsPassConfig::addIRPasses() { + TargetPassConfig::addIRPasses(); + if (getMipsSubtarget().os16()) + addPass(createMipsOs16(getMipsTargetMachine())); + if (getMipsSubtarget().inMips16HardFloat()) + addPass(createMips16HardFloat(getMipsTargetMachine())); + addPass(createPartiallyInlineLibCallsPass()); +} +// Install an instruction selector pass using // the ISelDag to gen Mips code. -bool MipsTargetMachine:: -addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel) -{ - PM.add(createMipsISelDag(*this)); +bool MipsPassConfig::addInstSelector() { + if (getMipsSubtarget().allowMixed16_32()) { + addPass(createMipsModuleISelDag(getMipsTargetMachine())); + addPass(createMips16ISelDag(getMipsTargetMachine())); + addPass(createMipsSEISelDag(getMipsTargetMachine())); + } else { + addPass(createMipsISelDag(getMipsTargetMachine())); + } return false; } -// Implemented by targets that want to run passes immediately before -// machine code is emitted. return true if -print-machineinstrs should +void MipsPassConfig::addMachineSSAOptimization() { + addPass(createMipsOptimizePICCallPass(getMipsTargetMachine())); + TargetPassConfig::addMachineSSAOptimization(); +} + +bool MipsPassConfig::addPreRegAlloc() { + if (getOptLevel() == CodeGenOpt::None) { + addPass(createMipsOptimizePICCallPass(getMipsTargetMachine())); + return true; + } + else + return false; +} + +void MipsTargetMachine::addAnalysisPasses(PassManagerBase &PM) { + if (Subtarget.allowMixed16_32()) { + DEBUG(errs() << "No "); + //FIXME: The Basic Target Transform Info + // pass needs to become a function pass instead of + // being an immutable pass and then this method as it exists now + // would be unnecessary. + PM.add(createNoTargetTransformInfoPass()); + } else + LLVMTargetMachine::addAnalysisPasses(PM); + DEBUG(errs() << "Target Transform Info Pass Added\n"); +} + +// Implemented by targets that want to run passes immediately before +// machine code is emitted. return true if -print-machineinstrs should // print out the code after the passes. -bool MipsTargetMachine:: -addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel) -{ - PM.add(createMipsDelaySlotFillerPass(*this)); +bool MipsPassConfig::addPreEmitPass() { + MipsTargetMachine &TM = getMipsTargetMachine(); + const MipsSubtarget &Subtarget = TM.getSubtarget(); + addPass(createMipsDelaySlotFillerPass(TM)); + + if (Subtarget.enableLongBranchPass()) + addPass(createMipsLongBranchPass(TM)); + if (Subtarget.inMips16Mode() || + Subtarget.allowMixed16_32()) + addPass(createMipsConstantIslandPass(TM)); + return true; } + +bool MipsTargetMachine::addCodeEmitter(PassManagerBase &PM, + JITCodeEmitter &JCE) { + // Machine code emitter pass for Mips. + PM.add(createMipsJITCodeEmitterPass(*this, JCE)); + return false; +}